Cement-mold.



No. 757,093. PATENTED APR. l2, 1904.

R. B. GOLTRIN.

CEMENT MOLD.

APPLICATION FILED 00T. 22, 1903.

isp MODEL.

lINTTnn BTaTes Patented April 12, 1904.

ROBERT B. COLTRIN, 0F JACKSON, MICHIGAN.

CEMENT-MOLD.

SPECIFICATION forming part of Letters Patent No. 757,093, dated April12, 1904.

Application filed October ZZ, 1903. Serial No. 178.072. (No model.)

T0 all whom. it may concern.'

Bc it known that I, ROBERT B. CoL'rRIN, a citizen of the United States,residing at Jackson, in the county of Jackson and State of Michigan,have invented certain new and useful Improvements in Cement-Molds;andIdo hereby declare the following to be afull, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

j My invention relates to molding apparatus for making stone or blocksfrom cement or other plastic material, and particularly to molds of thatclass having movable orl separable sides and ends adapted to be closedor brought into position to form the shaping-receptacle for the plasticmaterial and to be opened or removed to release the formed blocks orstones and permit their removal.

The principal objects are to provide an improved mold of this charactersimple and inexpensive in structure, efficient, and exceedinglyconvenient in use; to simplify and improve the connections and devicesfor holding the parts in molding' position; to provide for niceadjustments of the sides and ends for squaring up the mold accurately toform perfectly even and exact blocks or stone, and to furnish improvedmeans for molding hollow blocks or stone and for detaching the cores orinner forms employed for this purpose without liability of injuring theblocks.

The invention will first be described with reference to the accompanyingdrawings, which are to be taken as a part of this specitication, and itwill then be set forth more particularly in the annexed claims.

In said drawings, Figure l is a perspective view of a molding apparatusembodying my` invention without the top plate usually employed inconnection with the molding-receptacle represented. Fig. 2 is aperspective view of the base of said apparatus with the position of asuperimposed auxiliary base or bottom preferably used indicated bydotted lines. Fig. 3 is a fragmentary perspective view of the upper partof the mold with the top plate mounted therein, showing the means forlifting out the core or inner form. Fig. 4 is a detail end View of theadjustable fastening of one of the end braces to the arm of thesupporting-base.

The supporting-base of the illustrated. apparatus is indicated" by thenumeral 1, and the sides are designated by the numerals 2 and 3,respectively. These parts when closed or held in operative positionconstitute the mold or `cement receptacle, in which,- however, aremovable auxiliary bottom or board 4 (indicated by dotted lines in Fig.2) is preferably iitted, so that the molded block or stone can be liftedand removed by and with said bottom. A top plate 5 is also usuallyemployed for compressing the material and iiattening its upper surface.The mold may of course be of different forms or coniigurations inaccordance with the shape of the stone or block to be molded, which,however, is usually rectangular, wherefore the` mold is represented ofcorresponding form and the sides and ends as iiat rectangular plates. Ifa solid block or stone is to be made, the mold is of course leftunobstructed inside; but if a hollow block is to be made any suitablecore or inner form or a number of the same may be used-such, forexample, as shown and designated by the symbol 6.

While the supporting-base l may be solid, it is shown in the form of arectangular open frame the sides and ends of which are of angularconstruction, providing a fiat upper border or supporting-surface anddownturned edges or flanges, which is an advantageous structural featurecombining lightness and strength. The ends of the base are also shownsomewhat reduced in width, leaving cut-away portions at the corners, asindicated at 7, over which the corners of the auxiliary bottom or board4 project. rlhis is for the purpose of affording a convenient hold forlifting the board with the molded block thereon oif the base, which isusually accomplished by means of hooks engaging under said corners. Fromthe ends of the base project arms or narrow flat extensions 8, which forstrength and lightness may be of similar construction to the mainportion of the base, while from the sides near the corners extend shortarms or lugs 9, the purposes of which will hereinafter appear.

In the illustrated apparatus the side plates IOO 2 rest on the lateralarms or lugs 9. They abut against the ends or edges of the end plates 3,their lower parts abut against the sides of the base, and they are cutaway at their lower corners or formed with depending parts, so as to litbetween said arms or lugs, whereby the side plates are held in positionagainst lengthwise displacement. The lower parts of said side plates areheld tightly against the sides of the base vor against the edges of theend plates by suitable devices inserted transversely through the arms orlugs 9, such as by bolts 10, tightened in slots in said arms or lugs,which thus permit of adjustment. The upper parts of the side plates aresimilarly held in place by bolts 11, inserted through slotted lugs 12,projecting from the end plates.

The end plates fit between the side plates and abut against the ends ofthe base, while their lugs 12 abut against the ends of said side plates.The lower parts of the end plates are intermediately cut away or formedwith depending projections to fit over or at opposite sides of the armsor extensions 8, and they are held firmly against the ends of the baseby bolts 13, inserted transversely through slots in said arms orextensions. ends of these arms or extensions are pivotally securedfoldable or medially-hin ged braces 14, also pivotally secured to theend plates, and said braces when straight, as represented in Fig. 1,hold the end plates rigidly in position. For the purposes of adjustmentsaid braces are preferably connected to the arms by pivoting them toplates 15, adjustably secured thereon, as by means of threaded studs orbolts 16, depending through longitudinal slots in said arms and havingfastening-nuts screwed thereon. (Illustrated in Fig. 4.)

The mold as thus described may be put together and squared up easily andquickly simply by setting the bolts 10, 11, 18, and 16 properly, raisingthe side plates or mounting them in vertical position, then raising theend plates to vertical position and straightening the braces 14, whichthus lock the parts in molding position. The bolt-and-slot fasteningswhich hold the parts together permit of delicate adjustments forsquaring up the mold accurately for forming blocks of exact shape anddimensions. This feature of adjustment is important in view of theslight Variations in shapes or exactitudes of the side and end platesproduced in casting.

When the mold is arranged in proper operative position, the preparedcement or plastic material is placed therein and rammed or packed ashard as desired, and further pressure may also be applied, and the uppersurface of the material may be rendered smooth or flat by means of a topplate, on which a force may be exerted by any suitable means. The topplate may, however,be used or not, as the requirements or preferences ofthe workman may dictate. After the molded block or To the outer stonehas been permitted to set sufliciently the top plate, if used,isremoved, the braces 14 are doubled or folded, which causes the endplates to swing outward, thus releasing the upper parts of the sideplates, which may likewise swing or move outward. may then be lifted bythe auxiliary bottom or base and removed, and the mold may immediatelybe placed into molding position again simply by raising the side plates,then raising the end plates, and straightening or bearing down on thehinged braces. It will be observed that no disturbance of any of thebolts is necessary after they have once been set.

As before stated, if a hollow block is to be molded any appropriate coreor cores may be used,and the same may be arranged and maintained inproper position on the auxiliary bottom or base 4 by suitablemeans-sucli,for example, as pins depending from the core or cores intoapertures therefor in the board. I have illustrated in the present casean improved form of core (designated by the symbol 6) having the generaloutline of the gure 8, so as to impart a corresponding shape to thehollow or opening in the block. This renders the block substantiallyhollow at each halibut leaves thicker reinforced parts at the centers ofthe sides or between the greater hollow parts. The form of the hollowhas also certain advantages in using the blocks for buildings orconstructions.

As a simple and convenient means for lifting the core out of the moldedblock or stone short bent handles or levers 17 are shown in Fig. -1inserted into notches or recesses in the opposite ends or faces of thecore near its top. Said levers may rest on suitable supports, or, asshown, they may be fulcrumed to cross-bars 18, set across the top of themold.

The top plate 5 (illustrated in Fig. 3) has an opening to receive or litover the upper part of the core, which projects through or above thesame, so that the handles or levers 17 engage the core above said topplate. To raise the core, the operator may bear down on the free ends ofthe levers, and the top plate may serve as a fulcrum or support, or, asillustrated,the top plate may be formed with crossribs which strengthenthe same, prevent warping or breaking thereof, and which also serve asfulcrums for the levers.

It will be understood, of course, that the apparatus is susceptible ofvarious modifications in details of construction and arrangement withoutdeparting from the scope of my invention Yas, for example, thesubstitution of equivalent fastening devices or a change of therelations of the side and end members and the connections thereof. f

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent of the United States, is-

l. In a mold, a base and separable side and end members, and adjustableconnections be- The molded block IOO IIO

tween said base and members and between the members for holding them inoperative position, which connections permit adjustment of said membersand are adapted to remain fixed or set after adjustment so as to permitseparation of the members without disturbance or unfastening of saidconnections.

2. In a mold, a base and separable side and end members, set orrelatively fixed connections between said base and members permittingdetachment of the latter, and connections between said members forholding them in operative position.

3. In a mold, a base and separable side and end members set against itsedges connected thereto at their lower parts, one corresponding pair ofsaid membersxbeing interposed or fitted between the other pair, andconnections between said members for holding them in operative position,said connections holding the outer pair of members from both inward andoutward displacement, and means holding the inner pair of members inposition and permitting separation thereof without unfastening saidconnections.

4. In a mold, a base and separable or outwardly-movable side and endmembers, one pair of said members having lugs or projections engagingthe outer faces of the other members to hold them in operative position,whereby on outward movement of the former members the latter may also bemoved outwardly, and means holding said former members in operativeposition and permitting outward movement thereof. j

5. Ina mold, a base having end and lateral projections or extensions,separable side and end members having cut-away portions or dependingparts resting over or beside said projections, and bolts or equivalentdevices adjustably secured in slots in said projections and engaging theouter faces of Vsaid members, and connections between said members forholding them in operative position.

6. In a mold, a base having end extensions or projections, side members,and separable or outwardly-movable end members, and foldable orintermediately-hinged braces between said end members and extensionsadapted when straight to hold the members in raised position.

7. In a mold, a base, separable or outwardlymovable side and endmembers, one opposite pair of said members having foldable bracesconnected to them and to the base adapted when straight to hold saidmembers in raised position, and connections between the braced membersand the others for holding the latter also in raised position.`

8. In a mold, a base having opposite projections or extensions,separable or outwardlymovable side and end members, and foldable bracesbetween said extensions and the corresponding' members, the latter beingfitted between or within the otherfmembers and llaving lugs orprojections engaging the outer sides of saidother members.

9. In a mold, a base having end arms or extensions and lateral lugs orprojections, side members resting on said lateral projections and havingparts depending between or beside them and abutting against the sides ofthe base, end members resting on said end extensions having a cut-awayportion thereover or depending parts beside said .extensions andabutting against-the ends of the base, bolts secured in slots in saidlateral projections and end extensions or equivalent adjustable devicesengaging the outer faces of said members to hold their lower parts inplace, foldable or intermediately-hinged braces between said end membersand extensions, and connections between said end and side members forholding the latter in vertical position with the end members.

l0. In a mold, a base having end arms or extensions and lateral lugs orprojections, side members resting on said lateral projections and havingparts depending between or beside them and abutting against the sides ofthe base, end members interposed between or with i in the side membersresting on said end extensions having a cut-away portion thereover ordepending parts beside said extensions and abutting against the ends ofthe base, bolts secured in slots in said lateral projections and endextensions or equivalent adjustable devices engaging the outer faces ofsaid members to hold their lower parts in place, foldable orintermediately-hinged braces between said end members and extensions.the connections of said braces to one of said parts beingI adjustable,and slotted lugs projecting from said end members and having bolts orequivalent devices secured therein and engaging the outer faces of saidmembers.

11. In a mold, a receptacle for the material to be molded having anoutwardly-movable door or member, and a foldable orintermediately-hinged brace between said member and the base of thereceptacle, the connection to one of said parts being adjustable.

l2. In a mold, a receptacle for the material to be molded having anoutwardly-movable door or member, a foldable or intermediatelyhingedbrace pivotally connected to said member and an extension of the base,the connec- IOO IOS

IIO

tion to the latter comprising a plate to which *i said brace is pivotedhaving a depending fastening-bolt adjustably secured in a slot in saidextension or equivalent fastening means.

In testimony whereof I affix my signature in presence of two witnesses.

ROBERT B. COLTBIN.

Witnesses:

MARY A. WILSON, Oseoon H. DowELL.

